Slide 1

DOEÕs Office of Science: Enabling Large-Scale Science

Slide 3

Large-Scale Science: High Energy PhysicsÕ
Large Hadron Collider (Accelerator) at CERN

The Largest Facility: Large Hadron Collider at CERN

Data Management Model: A refined view of the LHC Data Grid Hierarchy where operations of the Tier2 centers and the U.S. Tier1 center are integrated through network connections with typical speeds in the 10 Gbps range. [ICFA SCIC]

Accumulated data (Terabytes) received by CMS Data Centers (Òtier1Ó sites) and many analysis centers (Òtier2Ó sites) during the past 12 months (15 petabytes of data) [LHC/CMS]
This sets the scale of the LHC distributed data analysis problem.

ÒService Oriented ArchitectureÓ Data Management Service

Slide 9

Service Oriented Architecture / Systems of Systems

The LHC Data Management System has Several Characteristics that Result in
Requirements for the Network and its Services

Enabling Large-Scale Science

Networks Must Provide Communication Capability that is Service-Oriented

The ESnet Approach

1) Network Architecture Tailored to Circuit-Oriented Services

High Bandwidth all the Way to the End Sites – major ESnet
sites are now effectively directly on the ESnet ÒcoreÓ network

2) Multi-Domain Virtual Circuits

OSCARS

3) perfSONAR Monitoring Applications Move Us Toward Service-Oriented Communications Services

E2Emon: Status of E2E link CERN-LHCOPN-FNAL-001

Path Performance Monitoring

Traceroute Visualizer

perfSONAR architecture

perfSONAR Only Works E2E When All Networks Participate

Conclusions

Federated Trust Services – Support for Large-Scale Collaboration

ESnet Public Key Infrastructure

References